/****************************************************************************
 *
 * Copyright (C) 2003-2008 Los Alamos National Security, LLC
 *                         Packet Analytics Corporation
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License Version 2 as
 * published by the Free Software Foundation.  You may not use, modify or
 * distribute this program under any other version of the GNU General
 * Public License.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 ****************************************************************************/
package nfse.query;

import java.util.Vector;

/**
 * <p>Title: </p>
 * <p>Description: </p>
 * <p>Copyright: Copyright (c) 2003</p>
 * <p>Company: </p>
 * @author unascribed
 * @version 1.0
 */

public class Join {
  private Vector<Query> queries = new Vector<Query>();

  public Join() {
  }

  public boolean validate() {
    // This should check to see that the query vector contains
    // valid, joinable subqueries (i.e. all of the same type)
    return true;
  }

  public void addQuery(Query query) {
    queries.addElement(query);
  }

  public String toXML() {
    String temp = "";
    temp += "<Join>";
    for (int i = 0; i < queries.size(); i++)
      temp += ((Query)queries.elementAt(i)).toXML();
    temp += "</Join>";
    return temp;
  }

  public String toString() {
    return this.toXML();
  }
}